Adjustable clamp.



F. X. WIEDEMAN.

ADJUSTABLE CLAMPI APPLICATION FILED my I4. IsII.

Lgzs, I Patented 3fm. 8,1918.

u Airs* Q1 I v ATN@ FRAN-K X. WIRDRMAN, or HARTFORD, c'oNNRc'rcuT, Ass-renoue or one-HALF 'ro RUDOLPH .'r. KORNRRATH, or HARTEORD, CONNECTICUT.

ADJUSTABLE CLAMP.

Specification of Letters Patent.

Patente-d Jan. 8, 1918.

To all whom t mag/'concern Be .it known that I, FRANK X. lVrRDmrAn, a citizen of the United States, residing at Hartford. in the county of Hartford and State of Connecticut, have invented a new and useful Improvement in Adjustable Clamps, ot' which the following is a speeltication.

This invention relates 'to those clamps which` while more particularly designed for attaching mirrors, spot-lights, reliectors, shades, and screens, to the frames of wind shields of automobiles, may be used for attaching various appli-.incesto other supports.

The object of the invention is tojprovide a simple, cheap and readily adjustable appliance supporting lclamp which is somade that it can be quickly arranged to firmly grip trames or posts of any of the sizes and cross sectional shapes commonly used.

Figure l of the accompanying drawings shows a top view o1 one form of clamp which embodies the invention. Fig. 2 'shows a side elevation ot' the same. Fig. 3 shovsV an edge elevation. Fig. 4 shows a horizontal section on the plane indicated by the line f-li on Fig. 2, looking in the direction indicated by the arrow. Fig. 5 shows a vertical section on the plane indicated by the line 5 on Fig. 1, looking in the direction indicated by the arrow. Fig. 6 shows holding jaws for the clamp which are designed to grasp a triangular frame post. Fig. 7 shows holding jaws designed to grasp a square post. Fig. 8 shows the jaws used to grip a channel post. Fig. 9 shows the jaws shaped to hold a U-shaped post. Fig. 10 shows a Inodiiicd form of the clamp with the jaws illustrated as holding an oval post.

In the form of clamp first illustrated there is a plate l with perforations 2 and 3 Jfor the attachment of any desired appliance. This plate has a soeketed head 4 which is designed to receive the inner end of a removable jaw 5 and its stem 6 and the stud 7 which prevents the jaw from rotating. The outer end of the jaw is shaped to fit and clasp the part to which the device is to be attached.

The other member of the clamp illustrated has a plate 9 with a slot 10 and a head 11. This head has a threaded socket for receiving the threaded plug 12. and the inner end of the removable jaw 13, the stem l-'i of which jaw extends into a central opening in the threaded plug. The outer end of the plug is shaped for the application Ot a` wrench and the outer end of this jaw is shaped to correspond with the outer end of the complementary jaw carried by the head on the other plate. The two plates are tastened together by means et a bolt 15 which extends through the slot 10 in one plate into a threaded perforation in the other plate, a washer 16 desirably being placed under the head ofthe bolt. The plate 1 is provided with teeth 17 and the plate 9 has correspond ing teeth 18. rlhese teeth are engaged with the heads the desired distance apart and then when the bolt is tightened in such manner as to hold the plates together they cannot separate or move longitudinally with relation to each other.

The two plates are coarsely adjusted and fastened together' with the heads separated the desired distance apart. This, of course, can be varied as desired by loosening the bolt and sliding` they plates with relation to each other. Jaws having the required frime gripping configurations in their opposing races are inserted in the heads and then the jaws are tightly clamped against the frame or post to which the device is to be attached by turning in the threaded plug. The jaws first shown have a configuration for gripping a round frame or post. The jaws shown in Figs. G, 7, 8, 9 and 10 are shaped to enable them to grip frames or posts of various cross sectional shapes.

In the second form shown the body 20 of the clamp is made in one piece. with the two heads 21 and 2Q integral therewith. The body has a forked stem Q3 to which the mirror, light, reflector,v shade, or screen may he clamped. The head 21 is provided with a socket for receiving the non-adjustable jaw 24 and its stem Q5. while the head 22 is provided with a socket for receiving the adjustable jaw 26 and also the threaded plug 27 which is used to set this jaw up tightly.

These clamps are capable ot' being used with frames or posts of anv common crosssectional shape and size. Ail that it is necessary to do is to insert in the heads jaws having a particular configuration necessary to fit the particular style ot frame or oost to which it is desired to clamp the device. The jaws are very cheap and numerous shapes and sizes can be kept in stock and supplied by anyone according to the use to which the clamp is to be put. The device can by this means be fitted by anyone so as to be tightly clamped to any ordinary structure for lirmly supporting the desired ap pliance. Y

The invention claimed iS;

1. A clamp having a body With tW-o heads, each having a cylindrical socket, the socket in one head being screw threaded, a. socketed plug screwed into the threaded socket, a cylindrical gripping jaw fitting in the threaded Socket and having a stem fitting the socketed plug, and a cylindrical gripping jaw removably fitting in the socket in the other head.

2. A clamp having a body with two heads, one head having a cylindrical socket and the other head having a cylindrical hole, said socket and hole being in axial alinement, a cylindrical gripping jaW fitting and detachablyxed in said socket in one head, a cylindrical gripping jaw fitting and having axial movement in said hole in the other head, and a threaded plug screwed into said hole against the back of the adjustable jaw for forcing that jaw axially toward the nonadjustable jaw.

3. A clamp having tivo heads provided with opposing cylindrical'sockets and adjustable toward and from each other, a cylindrical gripping jaw detachahly fixed in the socket in one head, acylindrical gripping jaw movable axially in the socket in the other head, and a plug screwed into the socket back of the head in the movable jaw ior forcing that jaw axially in the socket toward the jaw in the socket in the other head.

'4. A clamp having a body formed of tWo` plates adjustable flativlse with relationv toy 5. A clamp `having av body formed of two plates, a bolt for securing the platestogether, coperating teeth for preventing the sliding of one plate with relation tothe other, a socketed head on each plate, a nonadjustable gripping jaw removably located in one head, an adjustable gripping jaw re movably located in the other head. Vand a screw plug for forcing the adjustable jaw toward the non-adjustable jaw.

FRANK x. ivmnninnv.V

Copies of this patent may be obtained for ive cents each. by addressing the Commissioner of Patents.

Washington, .'D. C. v 

